.outline-container {
    width: 400px;
    min-height: 360px;
    margin: 100px auto;
}

.outline-container li {
    cursor: pointer;
    padding: 5px;
    display: block;
}

.outline-item {
    margin-bottom: 4px;
}

.secene-tree {
    display: none;
    padding-left: 10px;
}

.outline-item span {
    display: inline-block;
    padding: 5px;
}

.outline-active span {
    color: white;
    background-color: #25905f;
}